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Re: How to rename table's family name - HBase - [mail # user]
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...2011/1/9 Stack Thanks. But saving space is not an issue. Really renaming with going offline (rename table) or reload data (rename cf) is issue (especially in case of live data m...
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Author: Andrey Stepachev,
2011-01-09, 20:29
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Re: question about merge-join (or AND operator betwween colums) - HBase - [mail # user]
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...Ok. Understand. But do you check is it really an issue? I think that it is only 1 IO here, (especially if compression used)? You have big rows? 2011/1/9 Jack Levin ...
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Author: Andrey Stepachev,
2011-01-08, 22:54
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Re: question about merge-join (or AND operator betwween colums) - HBase - [mail # user]
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...More details on binary sorting you can read http://brunodumon.wordpress.com/2010/02/17/building-indexes-using-hbase-mapping-strings-numbers-and-dates-onto-bytes/ 2011/1/8 Jack Levin &n...
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Author: Andrey Stepachev,
2011-01-08, 21:59
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Re: question about merge-join (or AND operator betwween colums) - HBase - [mail # user]
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...Hm. But what the problem to have Long.MAX - dayNum instead of dayNum? In this case you get all data sorted in reverse order and you give last entries first in scan results? 2011/1/8 Ja...
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Author: Andrey Stepachev,
2011-01-08, 21:57
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Re: How to rename table's family name - HBase - [mail # user]
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...2011/1/8 Stack Yes! Are there any jira? I'll vote for it. ...
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Author: Andrey Stepachev,
2011-01-08, 19:36
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Re: question about merge-join (or AND operator betwween colums) - HBase - [mail # user]
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...I don't think that it is possible on scanner level with bloomfilters (families are in separate files, so they scanned independently). But you can use filters, to filter out unneeded data. &n...
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Author: Andrey Stepachev,
2011-01-08, 19:30
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Re: Java Commited Virtual Memory significally larged then Heap Memory - HBase - [mail # user]
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...No, I'm not using LZO on this host. Only cloudera hadoop 0.20.2+320 + hbase 0.89.20100830 Digging google gives only hints, that jit or something in jvm can eat memory, but nothing conc...
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Author: Andrey Stepachev,
2010-12-30, 20:33
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Re: Java Commited Virtual Memory significally larged then Heap Memory - HBase - [mail # user]
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...Addition information: ps shows, that my HBase process eats up to 4GB of RSS. $ ps --sort=-rss -eopid,rss | head | grep HMaster PID RSS 23476 3824892 2010/12/...
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Author: Andrey Stepachev,
2010-12-30, 08:13
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Java Commited Virtual Memory significally larged then Heap Memory - HBase - [mail # user]
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...Hi All. After heavy load into hbase (single node, nondistributed test system) I got 4Gb process size of my HBase java process. On 6GB machine there was no room for anything else (disk ...
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Author: Andrey Stepachev,
2010-12-30, 08:01
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Re: Insert into tall table 50% faster than wide table - HBase - [mail # user]
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...2010/12/23 Ted Dunning Opps. :). Maybe you put more data? Do you using compression? (in case of prefixed qualifiers you get more data, that uuid can has comparable length ...
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Author: Andrey Stepachev,
2010-12-23, 09:57
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